| /**************************************************************************//** | |
| * @file dac.c | |
| * @version V1.00 | |
| * @brief M2351 series DAC driver source file | |
| * | |
| * @note | |
| * Copyright (C) 2017 Nuvoton Technology Corp. All rights reserved. | |
| *****************************************************************************/ | |
| #include "NuMicro.h" | |
| /** @addtogroup Standard_Driver Standard Driver | |
| @{ | |
| */ | |
| /** @addtogroup DAC_Driver DAC Driver | |
| @{ | |
| */ | |
| /** @addtogroup DAC_EXPORTED_FUNCTIONS DAC Exported Functions | |
| @{ | |
| */ | |
| /** | |
| * @brief This function make DAC module be ready to convert. | |
| * @param[in] dac The pointer of the specified DAC module. | |
| * @param[in] u32Ch Not used in M2351 Series DAC. | |
| * @param[in] u32TrgSrc Decides the trigger source. Valid values are: | |
| * - \ref DAC_WRITE_DAT_TRIGGER :Write DAC_DAT trigger | |
| * - \ref DAC_SOFTWARE_TRIGGER :Software trigger | |
| * - \ref DAC_LOW_LEVEL_TRIGGER :STDAC pin low level trigger | |
| * - \ref DAC_HIGH_LEVEL_TRIGGER :STDAC pin high level trigger | |
| * - \ref DAC_FALLING_EDGE_TRIGGER :STDAC pin falling edge trigger | |
| * - \ref DAC_RISING_EDGE_TRIGGER :STDAC pin rising edge trigger | |
| * - \ref DAC_TIMER0_TRIGGER :Timer 0 trigger | |
| * - \ref DAC_TIMER1_TRIGGER :Timer 1 trigger | |
| * - \ref DAC_TIMER2_TRIGGER :Timer 2 trigger | |
| * - \ref DAC_TIMER3_TRIGGER :Timer 3 trigger | |
| * - \ref DAC_EPWM0_TRIGGER :EPWM0 trigger | |
| * - \ref DAC_EPWM1_TRIGGER :EPWM1 trigger | |
| * @return None | |
| * @details The DAC conversion can be started by writing DAC_DAT, software trigger or hardware trigger. | |
| * When TRGEN (DAC_CTL[4]) is 0, the data conversion is started by writing DAC_DAT register. | |
| * When TRGEN (DAC_CTL[4]) is 1, the data conversion is started by SWTRG (DAC_SWTRG[0]) is set to 1, | |
| * external STDAC pin, timer event, or EPWM event. | |
| */ | |
| void DAC_Open(DAC_T *dac, | |
| uint32_t u32Ch, | |
| uint32_t u32TrgSrc) | |
| { | |
| dac->CTL &= ~(DAC_CTL_ETRGSEL_Msk | DAC_CTL_TRGSEL_Msk | DAC_CTL_TRGEN_Msk); | |
| dac->CTL |= (u32TrgSrc | DAC_CTL_DACEN_Msk); | |
| } | |
| /** | |
| * @brief Disable DAC analog power. | |
| * @param[in] dac The pointer of the specified DAC module. | |
| * @param[in] u32Ch Not used in M2351 Series DAC. | |
| * @return None | |
| * @details Disable DAC analog power for saving power consumption. | |
| */ | |
| void DAC_Close(DAC_T *dac, uint32_t u32Ch) | |
| { | |
| dac->CTL &= (~DAC_CTL_DACEN_Msk); | |
| } | |
| /** | |
| * @brief Set delay time for DAC to become stable. | |
| * @param[in] dac The pointer of the specified DAC module. | |
| * @param[in] u32Delay Decides the DAC conversion settling time, the range is from 0~(1023/PCLK1*1000000) micro seconds. | |
| * @return Real DAC conversion settling time (micro second). | |
| * @details For example, DAC controller clock speed is 64MHz and DAC conversion setting time is 1 us, SETTLET (DAC_TCTL[9:0]) value must be greater than 0x40. | |
| * @note User needs to write appropriate value to meet DAC conversion settling time base on PCLK (APB clock) speed. | |
| */ | |
| uint32_t DAC_SetDelayTime(DAC_T *dac, uint32_t u32Delay) | |
| { | |
| dac->TCTL = ((CLK_GetPCLK1Freq() * u32Delay / 1000000UL) & 0x3FFUL); | |
| return ((dac->TCTL) * 1000000UL / CLK_GetPCLK1Freq()); | |
| } | |
| /*@}*/ /* end of group DAC_EXPORTED_FUNCTIONS */ | |
| /*@}*/ /* end of group DAC_Driver */ | |
| /*@}*/ /* end of group Standard_Driver */ | |
| /*** (C) COPYRIGHT 2017 Nuvoton Technology Corp. ***/ |